Journal
ARCHIVE FOR RATIONAL MECHANICS AND ANALYSIS
Volume 235, Issue 1, Pages 635-690Publisher
SPRINGER
DOI: 10.1007/s00205-019-01430-4
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Funding
- EPSRC [EP/P031587/1, EP/L024926/1, EP/L020564/1, 1676118]
- Imperial College President's Ph.D. Scholarship
- EPSRC [EP/L025159/1] Funding Source: UKRI
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We study the McKean-Vlasov equation partial derivative(iota)rho = beta(-1)Delta rho + kappa del.(rho del (W star rho)), with periodic boundary conditions on the torus. We first study the global asymptotic stability of the homogeneous steady state. We then focus our attention on the stationary system, and prove the existence of nontrivial solutions branching from the homogeneous steady state, through possibly infinitely many bifurcations, under appropriate assumptions on the interaction potential. We also provide sufficient conditions for the existence of continuous and discontinuous phase transitions. Finally, we showcase these results by applying them to several examples of interaction potentials such as the noisy Kuramoto model for synchronisation, the Keller-Segel model for bacterial chemotaxis, and the noisy Hegselmann-Krausse model for opinion dynamics.
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